NO, he should NOT be worried. "Technically" he doesn't have an ALO until he's officially a candidate.
From your post, I gather you have the name/phone/e-mail of the ALO? If so, I'd keep after him. ALO's have other jobs and are quite often VERY busy. We can get a bit behind from time to time and this is summer; VERY early in our process, so it's nothing to be concerned about.
But if I can help, let me know:
flieger83@cox.net
Steve
USAFA ALO
USAFA '83